Each disk may have a volume label, created when the disk is formatted or with the external LABEL command. Also, every disk formatted with Windows has a volume serial number.

The VOL command will display the volume label and, if available, the volume serial number of a disk volume. If the disk doesn't have a volume label, VOL will report that it is "unlabeled." If you don't specify a drive, VOL displays information about the current drive:

[c:\] vol

Volume in drive C: is MYHARDDISK

If available, the volume serial number will appear after the drive label or name.